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n2doc

(47,953 posts)
Tue Apr 26, 2016, 11:04 AM Apr 2016

Despite their small brains ravens and crows are just as clever as chimps

A study led by researchers at Lund University in Sweden shows that ravens are as clever as chimpanzees, despite having much smaller brains, indicating that rather than the size of the brain, the neuronal density and the structure of the birds' brains play an important role in terms of their intelligence.

"Absolute brain size is not the whole story. We found that corvid birds performed as well as great apes, despite having much smaller brains," says Can Kabadayi, doctoral student in Cognitive Science.

Intelligence is difficult to test, but one aspect of being clever is inhibitory control, and the ability to override animal impulses and choose a more rational behaviour. Researchers at Duke University, USA, conducted a large-scale study in 2014, where they compared the inhibitory control of 36 different animal species, mainly primates and apes. The team used the established cylinder test, where food is placed in a transparent tube with openings on both sides. The challenge for the animal is to retrieve the food using the side openings, instead of trying to reach for it directly. To succeed, the animal has to show constraint and choose a more efficient strategy for obtaining the food.

The large-scale study concluded that great apes performed the best, and that absolute brain size appeared to be key when it comes to intelligence. However, they didn't conduct the cylinder test on corvid birds.

more
https://www.sciencedaily.com/releases/2016/04/160426101527.htm

And both are smarter than the Donald....

31 replies = new reply since forum marked as read
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Despite their small brains ravens and crows are just as clever as chimps (Original Post) n2doc Apr 2016 OP
Unfortunately 2naSalit Apr 2016 #1
I would say less raw capacity AtheistCrusader Apr 2016 #11
I would argue 2naSalit Apr 2016 #13
I would take that wager with you.. AuntPatsy Apr 2016 #29
Not for nothing did Aesop write a fable about a thirsty crow. Bad Dog Apr 2016 #2
Everything about birds has to be small, lightweight, and efficient. Otherwise they can't fly. hunter Apr 2016 #3
Crows are smart Botany Apr 2016 #4
Very interesting!!! n/t ReRe Apr 2016 #9
It gets better Botany Apr 2016 #25
Easy... ReRe Apr 2016 #27
I approve this post! Old Crow Apr 2016 #5
I AGREE!!! Land of Enchantment Apr 2016 #16
I thought it had been shown a long time ago greymouse Apr 2016 #6
I know a few bird brains. Spitfire of ATJ Apr 2016 #7
but none of them are as smart as the honey badger La Lioness Priyanka Apr 2016 #8
Let`s hear it for ravens and crows! democrank Apr 2016 #10
His book 2naSalit Apr 2016 #15
Crows are *way* smart SeattleVet Apr 2016 #12
"Absolute brain size is not the whole story." jomin41 Apr 2016 #14
Makes me think of a headline you will never see: hueymahl Apr 2016 #17
*snort* NT getting old in mke Apr 2016 #21
ravens go crazy with mirrors & will come in your house womanofthehills Apr 2016 #18
I'm jealous. Your place sounds a lot like ours Land of Enchantment Apr 2016 #23
I was once up in the bush in Canada and a Canada Jay would take certian fishing lures and .... Botany Apr 2016 #26
Corvids Rock!!! Check out these videos--- Land of Enchantment Apr 2016 #19
Nice...Thanks! KoKo Apr 2016 #20
Forgot to add--ravens mate for life, raise the young communally, Land of Enchantment Apr 2016 #22
And this classic internet video of crows provoking a cat fight... hunter Apr 2016 #24
I could be wrong, but I think they're trying to STOP a catfight, not provoke one. Old Crow Apr 2016 #28
Interesting. I've actually been amazed that crows back down to squirrels in the front yard. HuckleB Apr 2016 #30
Read "Mind of the Raven" by Bernd Heinrich. Yeah, they are smart birds! HuckleB Apr 2016 #31

2naSalit

(86,646 posts)
1. Unfortunately
Tue Apr 26, 2016, 11:25 AM
Apr 2016

Last edited Tue Apr 26, 2016, 01:39 PM - Edit history (1)

our preconceived notions of our intellect shroud the possibility that other species have any or equivalent intellect... I grew up with people referring to anything not human as "dumb animals" to which I took offense. We never seem to consider that animals could be intelligent except in anecdotal terms.

I would wager that most members of the animal kingdom are more intelligent than we humans.

AtheistCrusader

(33,982 posts)
11. I would say less raw capacity
Tue Apr 26, 2016, 01:26 PM
Apr 2016

They can't do as much as we can, but evolution provides; what they do, they do extremely fast and well.

And far more creatures than we thought have the spare processing power to wonder, dream, and play, etc.

Zoos make me uncomfortable. I'm no longer satisfied those animals don't know they are in prison.

2naSalit

(86,646 posts)
13. I would argue
Tue Apr 26, 2016, 01:45 PM
Apr 2016

that our value system is oriented toward the "humans are superior and, therefore, the alleged stewards of the natural world" and it is really only self-serving.

I am certain that the species in our biosphere do far more than we do, evolution or no. Humans contribute nothing to the health of the biosphere and what we do more of is destroy. Our species is the only one that makes no positive contribution, otherwise, every living thing in the natural world has a purposeful role in maintaining a natural balance whether we accept it or not.

I suspect we humans came here to destroy the biosphere and then move on to the next planet to trash.

hunter

(38,317 posts)
3. Everything about birds has to be small, lightweight, and efficient. Otherwise they can't fly.
Tue Apr 26, 2016, 11:53 AM
Apr 2016

Feet-on-the-ground mammals can carry a little extra weight, and with enough food a larger size and weight can be advantageous. Nobody messes with a grizzly bear.

ReRe

(10,597 posts)
27. Easy...
Tue Apr 26, 2016, 05:27 PM
Apr 2016

He has trained this crow! Guess it would have to be a smart bird in order to be trained!

greymouse

(872 posts)
6. I thought it had been shown a long time ago
Tue Apr 26, 2016, 01:03 PM
Apr 2016

that it is not the volume or weight of a brain but the surface area that is indicative of intelligence. For example, women's brains are smaller, but they are more deeply folded, and on tests of general intelligence we do equally as well as men.

democrank

(11,096 posts)
10. Let`s hear it for ravens and crows!
Tue Apr 26, 2016, 01:20 PM
Apr 2016

I truly love them.

Ever read RAVENS IN WINTER by Bernd Heinrich? Terrific book.

SeattleVet

(5,477 posts)
12. Crows are *way* smart
Tue Apr 26, 2016, 01:36 PM
Apr 2016

Professor Marzluff at the University of Washington has been studying them for several years. Here's a talk he gave. (It's long, but well worth it!)

<iframe width="560" height="315" src="

" frameborder="0" allowfullscreen></iframe>

hueymahl

(2,497 posts)
17. Makes me think of a headline you will never see:
Tue Apr 26, 2016, 01:52 PM
Apr 2016

"Despite their small brains, Republicans are just as clever as Democrats"

womanofthehills

(8,718 posts)
18. ravens go crazy with mirrors & will come in your house
Tue Apr 26, 2016, 02:01 PM
Apr 2016

I live in a rural area and have a tiny guest house - if the guest house door gets left open, the ravens go inside. Ravens especially love mirrors and they slime them all up looking at themselves. They can really trash a room fast - they get into everything.

The ravens are attracted by the water in my fish pond as I live in the high desert. In the summer I will sometimes have 50 ravens in my yard all cawing at the same time. I love it when they walk around like little penguins.

I have a 1200 gallon holding tank for my well water and a raven turned on the faucet by standing on it in front of the mirror and drained my entire water holding tank 3 times. I now am very careful about not leaving doors open. I hear one cawing as I'm typing this.

Land of Enchantment

(1,217 posts)
23. I'm jealous. Your place sounds a lot like ours
Tue Apr 26, 2016, 02:13 PM
Apr 2016

except for the pond. I will put some mirrors out for them and see what happens. I could spend hours watching them, I especially love the 'grandparent' ravens--they gallop with a weird little dance thrown in!!!!

?1

Botany

(70,516 posts)
26. I was once up in the bush in Canada and a Canada Jay would take certian fishing lures and ....
Tue Apr 26, 2016, 04:23 PM
Apr 2016

.... hang them from trees (but low enough so we could reach them) and he/she would watch as
we put them back on the table and I am almost sure the bird was laughing at us ..... he/she
would take the same lure back to the same tree everytime we left camp to go fish.

I miss those days ..... note to self ..... go back to Canada.

Land of Enchantment

(1,217 posts)
19. Corvids Rock!!! Check out these videos---
Tue Apr 26, 2016, 02:02 PM
Apr 2016

sorry for the commercials at the beginning....







and these are some of my raven children.....






Land of Enchantment

(1,217 posts)
22. Forgot to add--ravens mate for life, raise the young communally,
Tue Apr 26, 2016, 02:08 PM
Apr 2016

mourn their dead by forming a circle around it and standing in silence, make tools when they need them and get high by rolling in anthills to be bitten then roll to get rid of them. The ants' bites have a chemical that makes the ravens high. They also make swings out of barbed wire and love to play.

They LOVE roasted unsalted peanuts and eggs.

Old Crow

(2,212 posts)
28. I could be wrong, but I think they're trying to STOP a catfight, not provoke one.
Tue Apr 26, 2016, 06:14 PM
Apr 2016

At the start of the video, the cats were already eyeing one another and probably growling. And when the cats actually started fighting, the crows seemed agitated and continued all the harder to try to pull the cats' tails. If they had wanted the cats to fight, I think they would have simply sat back and enjoyed the show. Pure speculation on my part, but I suspect the crows had seen these two cats fight before.

Incidentally, in case anyone's wondering, the gray feathers on these birds indicate they're hooded crows, probably somewhere in Russia (based on the Cyrillic notes provided by the uploader).

HuckleB

(35,773 posts)
30. Interesting. I've actually been amazed that crows back down to squirrels in the front yard.
Wed Apr 27, 2016, 07:43 PM
Apr 2016

It seems like they could fly off with the squirrel in their talons, but they tend to defer.

Of course, they are smart, as the OP notes.

My cat, on the other hand, still chases squirrels.

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